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I Leiters Pata-nt No. 73,674, dated January 21,1868. I

PAPER-GUTTER.

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TO ALL WHOM 1T MAY CONGERN: l 4

Be it known that I, T-IIEODORE R. TIBY, of the town and county of Saratoga, and State of New York, v have invented a. new and improved Paper-Cutter; .and I do 'herebydeclare the following to be a full, clear, and exn'ct description of the'same, reference being had to theacoomponying drawings, which are made part of this specification.

Figure 1 is a section at a: x, fig. 3, of n paper-cutter, illustrating my invention.

- Figure 2 is an external view of the same. v l y i Figure 3 represents a section thereof" in the plone-indicated by the" line y'y, fig. 2.

Figure 4 represents 'rear edge View, thearrow in'flg. Qindicating the lineot` vision.

Similar letters of reference indicate-corresponding parts in the several'views.

My invention is chiefly designed for eutting'folded paper, subh, for example, as bookleaves, envelopes, sheets of letter-paper, Etc. i I `v I v It consists essentially of a. knife pivoted within a oase of: round, oval, square, oblong, or other form, the said knife being retracted by n spring, fand 'protruded by means ot' a. pin or knob projecting through o. slot'in the face of the case. The knife when advanced occupies a. central position within'e. slot in the periphery of `the ease, the sidcsof which slot guide the paper to the-lsfnite, and canse. it to out accurately along the crease.

In the drawings, A represents a lint case of metal, or other Amaterial. B is n knife, having :t euttingedge vatb. The said knife is mounted on a pivot, C, and provided-with a'pn or'knob, D, which projects through a. slot, E, concentric with the pivot C, for the purpose of protruding or thrusting out the knife through aslot, F, in the 'edge of the ease. When in this position, the edge of the knife forms an acute angle with the periphery of thecase.' A spring, G, retrncts the knife withinnthe ease when it is released.

The operation is ns follows: By applying the thumb to the knob D, the knife is pressed out through the slot l. The paper to be out is then introduced into the slot in front of the knife, with the latter within the foldof the paper,'and, by passing the instrument long the edge of thepaper, n smooth and accurate out isl eeotcd with the utmost facility. v l

My invention provides an instrument oflconvenient size and shape for carrying in the pocket, and well adapted for opening envelopes, cutting book-leaves, and many other purposes.

` lhe pivot may, i-f'preferred, be located at the lower endlor eloow of the knife, or in anintermediate po'sition, and the springend thumbfknob at the upper`- end., where the pivot is shown in the drawings. The knife may be thrust ont by a. spring, and held in by a catch, or the spi-ing may be entirely dispensed with, if preferred.

Having thus described my invention, what elztiin as new, and desiroto seeureby Lcttersntent, is

1. `',lhe paper-cutter, so constructed that when the vknite is thrust out its cutting-edge will form an acutel angle with the edge of the case. l

l 2. The slot Fadnpted and employed to guide the paper to the edge ofthe knife, substantially as setforth.

THEODORE R. TIMBY.

i Witnesses t l J. E. M'. BOWEN,

i Cuirs. D. Snrrn.- 

